Patent US2656310A successfully refreshed from Google Patents.
US2656310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon fractionation
Assignee: California Research LLC
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Filing: 1949-12-20
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Granted: 1953-10-20
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Expires: 1969-12-20
Abstract
No abstract record available.
Inventors
- 👤 Leland L Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:26
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PROCESS FOR FRACTIONALLY DISTILLING A MIXTURE COMPRISING ALKYL ARYL HYDROCARBONS ING A WIDE BOILING RANGE, AROMATIC HYDROCARBONS AND HF, SAID MIXTURE BEING SEPARATED FROM THE REACTION PRODUCT OBTAINED BY CONTACTING MIXED OLEFINIC HYDROCARBONS HAVING A WIDE BOILING RANGE WITH A MOLAR EXCESS OF AROMATIC HYDROCARBON IN THE PRESENCE OF HF; THE STEPS WHICH COMPRISE CONTINUOUSLY PASSING SAID MIXTURE INTO A FIRST DISTILLATION ZONE AND SEPARATING IN SAID FIRST ZONE A FIRST OVERHEAD FRACTION CONSISTING ESSENTIALLY OF UNREACTED AROMATIC HYDROCARBON AND HF AND A BOTTOMS FRACTION COMPRISING A MIXTURE OF ALKYL ARYL HYDROCARBON HAVING A WIDE BOILING RANGE, CONTINUOUSLY PASSING SAID BOTTOMS FRACTION INTO A SECOND DISTILLATION ZONE AND SEPARATING, IN SAID
Claim 2
Dependent Claim
113 words
IN A PROCESS FOR FRACTIONALLY DISTILLING A MIXTURE COMPRISING ALKYL ARYL HYDROCARBONS ING A WIDE BOILING RANGE, AROMATIC HYDROCARBONS AND HF, SAID MIXTURE BEING SEPARATED FROM THE REACTION PRODUCT OBTAINED BY CONTACTING MIXED OLEFINIC HYDROCARBONS HAVING A WIDE BOILING RANGE WITH A MOLAR EXCESS OF AROMATIC HYDROCARBON IN THE PRESENCE OF HF; THE STEPS WHICH COMPRISE CONTINUOUSLY PASSING SAID MIXTURE INTO A FIRST DISTILLATION ZONE AND SEPARATING IN SAID FIRST ZONE A FIRST OVERHEAD FRACTION CONSISTING ESSENTIALLY OF UNREACTED AROMATIC HYDROCARBON AND HF AND A BOTTOMS FRACTION COMPRISING A MIXTURE OF ALKYL ARYL HYDROCARBON HAVING A WIDE BOILING RANGE, CONTINUOUSLY PASSING SAID BOTTOMS FRACTION INTO A SECOND DISTILLATION ZONE AND SEPARATING, IN SAID
References Cited (Backward Citations)
US1957818A
Cited
US2070864A
Cited
US2232117A
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US2437356A
Cited
US2404340A
Cited
US2477382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |